How to Convert Unix Timestamps
Unix timestamps — the number of seconds since January 1, 1970 — are everywhere in APIs, databases, and logs. But staring at 1710345600 tells you nothing. This tool converts timestamps to human-readable dates and handles all the edge cases around timezones and formats.
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Enter a Unix timestamp
Type or paste a Unix timestamp in the input field. The tool auto-detects whether it is in seconds (10 digits) or milliseconds (13 digits) and shows the converted date immediately.
Or enter a human-readable date
Use the date picker or type a date in any common format (ISO 8601, RFC 2822, or natural language like 'March 13, 2026'). The tool converts it to a Unix timestamp in both seconds and milliseconds.
Select your timezone
Choose your local timezone or any IANA timezone (e.g., America/New_York, Europe/London, Asia/Tokyo) from the dropdown. The converted date adjusts to reflect the selected timezone.
View multiple output formats
The tool displays the date in ISO 8601, RFC 2822, relative time ('3 hours ago'), and your local format simultaneously. Each format has a copy button for quick use.
Use the live clock
The current Unix timestamp is displayed as a live counter at the top of the page. This is handy for generating 'now' timestamps for API testing or debugging time-sensitive logic.
Pro Tips
- *JavaScript Date.now() returns milliseconds, but most APIs expect seconds — remember to divide by 1000.
- *Unix timestamps do not account for leap seconds — this is by design and rarely matters in practice.
- *Store timestamps in UTC and convert to local time only at the display layer to avoid timezone bugs.
- *The Year 2038 problem affects 32-bit Unix timestamps — make sure your systems use 64-bit integers.
- *Use ISO 8601 format (2026-03-13T12:00:00Z) for human-readable dates in APIs — it is unambiguous and sortable.
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